<form action="<?php echo url::site( $action ); ?>" method="post">
    <div data-role="fieldcontain" class="ui-hide-label">
        
        <div class="ui-field-contain ui-body ui-br" data-role="fieldcontain">
            <label class="ui-input-text" for="nome_vacina">Nome da Vacina:</label>
            <input type="text" id="nome_vacina" name="nome_vacina" placeholder="Nome da Vacina" />
        </div>
        
        <button type="submit">Pesquisar</button>	 
        
    </div>
</form>